Carbureter.



W. W. HAMILL.

CARBURETER.

APPLICATION FILED JUNE 19. I9I4.

Patented Apr. 18, 1916.

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CARBURE'IER.

APPLICATION FILEUIUNE19.1914.

2 SHEETS-SHEET 2.

Patented Apr. 18, 1916.

Fig. 2.

Lzfliflm V WILLIAM \VILSON HAMILL, OF BROOMHILL, GLASGOW, SCOTLAND.

CARBURETER.

Application filed June 19, 1914.

To all whom it may concern Be it known that I, VILLIAM \ViLSON 'rlixjvriLn, a subject of the King of Great Britain, residing at Broomhill, Glasgow,

Scotland. have invented certain new and useful Improvements in Carbureters for In ternal(ombustion E-i'igines, of which the following is a specification.

This invention relates to carburetors for internal combustion engines and is an improvement in, or modification of, the inven tion described in the specification of my prior patent specification Number 1.104394 issued July 21st, 1914. In the specification of my said patent application I described a carburetor having primary and secondary a'r inlets and wherein the admission of fuel and air to the engine was controlled automatically by the action of the engine suction on a gravity controlled valve so constructed that the velocity of air in the vici'iity of the fuel inlet was kept practically constant under all working conditions. In this arrangement the air entering through the primary inlet impinged practically at right angles upon the liquid fuel as it issued in a thin film laterally from the circumferential orifice of a spraying device and, com- .niingling therewith, joined, in the mixing chamber, the air admitted through the sec ondary inlet.

Under the present invention I. so construct the carburetor that the fuel and inflowing air repeatedly impinge upon one another, thereby insuring a very fine atomization of the liquid fue and a very thorough admixture of the same with the air. This multiple impingement is, preferably, effected by first causing the air, which enters through the primary inlet, to impinge in the usual mannor upon the fuel as it issues in a thin film from the spraying device, then one portion of the resultant mixture is diverted through a plurality of inclined passages and, as it issues therefrom, is impinged upon by currents of air entering by the secondary inlet, while the other portion of the mixture passes upward and out through other inclined passages and, as it issues therefrom, again impinged upon by the mixture produced by the second impingen'ient.

In order that the invention may be clearly understood reference will now be made to the drawings appended hereto and forming part of this specification, and whereon Figures 1 and 2 are vert lcal sections, taken Specification of Letters Patent.

Patented Apr. 18, 1916. Serial No. 846,068.

at right angles to one another, of a carbureter such as described in the specification of my prior patent specification aforesaid, having a preferred form of the present invention embodied therein. In Fig. 2 the removable spraying device is shown in elevation.

In the construction shown on the drawings there is a carbureter casing 26 secured to its base 8 and a spraying. device is pushed up into place in a cylindrical bore 9 in said base this device being preferably of the construction set forth in the specification of my aforesaid prior patent and comprising a cylindrical sprayer tube 13 with an enlargement 11 at its lower end and an enlarged base 13* the sprayer being push jointed in place and held removably in position by a pivoted catch 13 of spring metal. WVithin the tube 13, whose upper end is open and has a circular and tapered edge forming a knife edge, there is a spindle screwed into the enlargement 13 and capable of being turned and vertically adjusted relatively with the tube 13 by means of a small wheel 42 at its lower end. The spindle is provided, at its upper end, with a circular head 21 which is adapted to close down on the open upper end of the tube 13. \Vhen the spindle 20 is moved upward relatively with the top of the tube 13 an annular orifice 21 of greater or less width is left for the issue of the fuel which sprays out from said orifice in a substantially lateral direction. The adjustment by means of the screwed spindle 20 determines the amount of oil to be sprayed. orking slidably upon the sprayer tube 13 is a fuel regulating sleeve 2 having tapered or triangular openings 22 therein, this sleeve he iug secured by means of a pin 2 to the valve. The valve itself has an enlarged head, made of a partly cylindrical and partly conical formation as shown, and, at its lower eud it is provided with a heavy solid base 1 which works within a cylindrical guide chamber 1" in the casing. The valve has a cylindrical bore in it marked 23 and this bore, at its upper end, tapers out slightly and is closed at the top by means of the screw plug 5. The head f the valve as shown, is coned at the underside at 3 and also at the upper side, at 3, a cylindrical portion 3* being therclietwecn which cylindrical portion wo ks within an opening made i=1 a downwardly projecting and tapering web 41 of conoidal formation at the interior of the casing of the carbureter. A plurality of upwardly inclined channels 6 are provided in the valve and radiate outwardly and upwardly in the manner indicated while the plug 5 has also a lurality of inclined channels 7 extending radially upward and outward. V v

The base 8 has a bearing or jointing face 10 engaged by a bearing face 12 formed on v the enlarged portion 13 of the spraying device. The fuel conduit 14, in thebase, discharges into an annular channel 15 formed in the base and which registers with an annula-r groove 16 formed in the hearing or jointing face 12 of the groove 16 and communicates through channels 17 with radial conduits 18 formed in the base of the nozzle of the spraying device, which, in turn, com municate with the fuel passage 19 between the nozzle 13 of the sprayer and the spindle 20. A jointing washer 27 having perforations 28 therein registering with the channel 15 and groove 16 is preferably inserted between the faces 10 and 12. The valve 1 is moved upward under the suction of the engine and moves downward by gravity the chamber 1 serving as a guide for it in its movements. According to the degree of suction of the engine, the valve is moved upward more or less and consequently opens, more or less, the secondary air passage 24- between the web 41 and the cylindric face 3" of the valve.

The details of construction and-the mode of action of the sprayer 13 and its fuel regulating sleeve 2 are set forth in the specification of my prior patent aforesaid. In this specification I have referred to these parts generally and only to such an extent as may be necessary for the clear and proper understanding of the present invention.

In operation, the liquid fuel issues in a thin film from the orifice 21 of the sprayer 5 nozzle 13 and passes through the taperedo openings 22- of the fuel sleeve- 2. The

primary air.supply passin from the inlets 29 along the passage 23 impinges upon the fuel, issuing from the orifice 21, and atomizes the same and also commingles therewith, as aforesaid, and one portion of the resultant mixture passes upward while the main portion is diverted (following a direction substantially the resultant of the previous lines of flow of the air and the oil) and passes upward through the channels 6 which are bored at an angle suitable for such resultant direction of flow, and, on issuing therefrom, is again impinged upon by the currents of secondary air, passing through the annular secondary inlet 24', the whole commingling and flowing in the direction of the arrow 7 The minor portion of the mixture passes upward, as aforesaid, into the diverging expansion chamber 25 in the valve and then escapes, by the channels 7 and flows outward in the direction of the arrows m.

It will be seen that the conformation and arrangement of the walls of the chamber 26, top of the air valve 1 and channels 6, 7, are such that the currents impinge upon one another at an angle, preferably at or about a right angle.

Having now fully described my invention what I claim and desire to secure by Letters Patent is o 1. A carburetor having, in combination,- a fuel spraying device, a sleeve slidabiy mounted on device and adapted to control the issue of fuel therefrom, hollow valve mounted on said sleeve so as to leave a passage therebetween, passage serving for the admission of a primary air supply and said valve being adapted to control a secondary air supply and having a plurality of inclined channels therein through which a mixture of primary air, from said air passage and fuel from the spraying device is adapted to pass and be impinged upon by the secondary air passing said valve.

2. A carbureter having, in combination, a fuel spraying device, a sleeve slidably mounted on said device and adapted to control the issue of fuel therefrom, a hollow valve mounted on said sleeve so as to leave a passage therebetween, said passage serving for the'admission of a primary air supply and said valve being adapted to control a secondary air supply and having a number of channels therethrough forming an angle with the axis corresponding with that formed by the resultant of the directions of flow of the primary air and fuel issuing from the spraying device, a mixture of said primary air and fuel bemg adapted to flow Z through said channels "and impinge upon the inflowing secondary air. 6

3. A carbureter having, in combination, a fuel sprayin device, a sleeve slidably mounted on sai device and adapted to control the issue of fuel therefrom, ahollow valve mounted on said sleeve so as to leave a passage therebetween, said passage serving for the admission of a primary air supply and said valve being adapted to control a secondary air supply and having a number of channels in the side and top thereof the arrangement being such that the primary air impinges upon the fuel issuing from the spraying device, a portion of the resultant mixture passing through the side channels in the valve and impinging upon the inflowing secondary. air while the remainder flows upward through the top channels and impinges upon the mixture of air and fuel flowing past said valve.

4. A carbureter having, in combination, a casing having a bearing face thereon and a recess therein, a praying device having an enlargement thereon adapted to engage till said recess and a bearing face thereon adapted to engage the hearing face on the casing, means for holding said device in the casing, a sleeve slidably mounted on said device and adapted to control the issue of fuel therefrom. a valve adapted to control the admission of air and means whereby the fuel and air entering the carbnreter are aused to in'ipinge repeatedly upon one another.

51. The combination, with a carburetor casing. of a fuel spraying device, a sleeve slidably mounted on said device and adapted to control the issue of fuel therefrom, a hollow valve connected with said sleeve so as to leave a passage therebctween, said passage serving for the admission of a primary air supply. and said valve being adapted to control the admission of a sec ondary air supply and having two series of channels therein through which a mixture of primary air from said air passage and fuel from the spraying device is adapted to pass and be impinged upon by the second ary air passing said valve.

The cmnbination. with a carlmretcr casing. of a fuel spraying device. a sleeve slidably mounted on said do. ice and adaptad to control the issue of fuel therefrom, a H llow valve connected with said sleeve so as to leave. a. passage thcrebctwccn. said passage serving for the admission of a primary Hi1: supply. and said valve being adapted to control the adn'iission of a sec ondary air supply aml having two series of' channels therein tln'ough which a mixture of primary air from said air passage aml fuel from the s'"':1yiiig device is adapted to pass and be impinged upon by the secondary air passing said valve, the channels of the two series being inclined at different; angles.

A :arburcter having, in combination, a fuel spraying device, a sleeve slidably mounted n said device and adapted to control the issue of fuel therefrom, a hollow valve mounted on said sleeve so as to leave a. passage thercbetwecn, said passage serving for the admission of a prin'iary air sup ply, and said valve being adapted to control a secondary air supply, the said valve having an enlarged head which is of partly cylindricai and partly conical formation, the head eing provided with a plurality of inclined channels through which a mixture of primary air from said air passage and fur-l from the spraying device is adapted to pass and be impinged upon by the secondary air passing said valve.

H. carluircter having, in con'iliination, a fuel spraying device, a sleeve slidably mounted on said device and adapted to control the issue of fuel therefrom, a. hollow val 1c mounted on said sleeve so as to leave a passage therebetween said passage serv- 'and said valve being a. fuel spraying ing for the admission of a primary air supply and said valve being adapted to control a secondary air supply. the said valve having at its upper end an enlarged head of partly cylindrical and partly conical formation and at its lower end a heavy solid base, said base working within a guide chamber in the carburetcri ing.

9. A carburetor having. in combination, a fuel spraying device, a sleeve slidably mounted on said device and adapted to control the issue of fuel therefrom, a hollow valve. mounted on said sleeve so as to leave a passage therela-tween. said passage serving for the. admission of a primary air supply aml said valve being adapted to control a secondary air supply. the said valve having its hollow interior closed, at top, by means of a screwed cover made in the valve and in said cover through which a mixture of primary air and fuel from the hollow interior of the valve is adapted to pass outward and mix with the secondary air. 7

it). carlulrcter having. in combination, a fuel spraying device, a sleeve slidably mounted on said dcvicc and adapted to coir trol the issue of fuel thcrefrmn, a hollow valve mounted on said sleeve so as to leave a passngc thcrelictwcen. said passage serving for the admission of a primary air supply and said valve being adapted to control a secondary air supply. connected to and moving in conjunction vwith said sleeve. the said valve having two series of passage ways extending from its hollow interior to the exterior thereof.

ll. carbnrctcr having, in combination, a fuel spraying device. .a sleeve Slidably mounted on vsaid device and adapted to control the issue of fuel therefrom, a hollow valve mounted on said sleeve so as to leave a passage thcrcbctwccn. aid passage serving for the admission of a primary air supply adapted to control a secondary air supply, the said valve being connected to and moving in conjunction with said sleeve. thc said valve having two series of passage ways extending from its hollow interior to the exterior thereof, the one series extending from substantially the ccntcr of the hollow part of the valve. and the other series extending from the top thereof.

12. A carburetor having, in combination, device, a. sleeve slirlably mounted on said device and adapted to control the issue of fuel therefrom, a hollow valve mounted on said sleeve so as to leave a passage therobetween, said passage serv ing for the admission of a primary air supply and said valve being adapted to control. a secondary air supply, the said valve being connected to and moving in conjunction with Said sleeve, the said valve having two and inclined channels the said valve being series of passage ways extending from its hollow interior to the exterior thereof, the one series extending upward at an inclination from substantially the center of the hollow part of the valve and the other series extending upward at an inclination from the top thereof.

13. A carbureter having, in combination, a fuel spraying device, a sleeve slidably mounted on said device and adapted to control the issue of fuel therefrom, a hollow valve connected to said sleeve so as to leave a passage therebetween said passage serving for the admission of a primary air supply and said valve being adapted to control a secondary air supply, the said valve having an enlarged head which, at its underside, is tapered outward and, at its upper side, is

tapered inward, the said head having channels in its lower tapered part and channels in its upper tapered part, these channels serving for the outward passage of a mixture of air and fuel from the interior of the valve. 7

14. A carbureter having, in combination,

a fuel spraying device, a sleeve slidably mounted on said device and adapted to control'the issue of fuel therefrom, a hollow valve connected to said sleeve so as to leave a' passage therebetween, said passage serving for the admission of a primary air supply and said valve being adapted to control a secondary air supply, the said valve having an enlarged head which, at its underside, is tapered outward and, at its upper side, 1s

'tapered inward, a cylindrical portion being made between said tapered parts, the said head having channels in its lower tapered part and channels in its upper tapered part, these latter channels extending to and through the said cylindrical portion, the channels serving for the outward passage of a mixture of air and fuel from the interior of the valve.

15. A carbureter having, in combination, a fuel spraying device, a fuel controlling sleeve slidahly mounted on said device, an automatically acting air controlling valve connected to and operating said sleeve, the said vali'e being enlarged at its lower end and working within a guide in the carbureter casing and being enlarged also at its upper end to a partly conical and partly cylindrical formation and having in its interior a central passage way which is partly cylindrical and partly conical, series of passage ways being made in the valve for the passage outward, from the central pa sage way, of air and fuel.

In testimony whereof I aflix my signatur in presence of two witnesses.

\VILL'I AM VILSON HAMII JL.

\Vitnesses:

W. G. PEARSON, STANLEY DUNLOI. 

